Improvement in machines foe making nails



tnitnhtatrs aient @ffice BENJAMIN aoniNso N, or BOSTON; MASSACHUSETTS.'

Letters Patent No. 72,230, dated December 17, 1867; autedated .December 5, 1867.

IMPROVEMENT IN MACHINES EOR'MAKING NAILS.

@ngt Stintino rifatta in iltilgtst Metiers Q-attnt mit milking pitt at fluit smet.

TO ALL WI-IOM IT MAY CON CERN:

Beit known that I, BENJAMIN ROBINSON, of Boston, inv the county of Suolk, and State of Massachusetts, haveinventcd a new and useful Improvement in Nail-Machines; and I do hereby declare that the following is a full, clear, and exact description of theeonstruction and operation ofthe same, reference being had to the annexed drawings, making a part of this specification, in whichy.Figure A1 is a plan. t

Figure 2, a side elevation.

Figure 3, an end elevation.

Figurefl, aztransverse vertical section on line a a.

Figure5, :a sectional device for one of many series in which the dies may be used.

Figure 6, aplan viewxot` the pressure-bar e; and

Figurel? represents a sheet of metal as it would appear if seen after it has passed through the machine.

By referring to letters, A. represents the frame; B, the movablel cross-head; C C C are male dies; E E E and Fare'adjustablescrews; G G, connection-rods; H H, eccentrics on the driving-shaft I; J J' are cross-bars in themain frame; K K K are female dies made in halves; L L L are bolts; M, a sheet of metal, from which nails are to be made; N N are feed-rolls; O O, gears orispur-wheels; P, a ratchet-wheel fastened tothe lower feed-roll, and operated by means of eccentric AH, connections R R, levers S S, and pawl T; U U are rubber springs, upon bolts VVV', which serve to regulate the pressure on feed-rolls N N by levers W W and thumb-screws X X; Y is a guide to direct the sheet from which nails are to be made.

My invention rela-tes to machines for making cut-nails by punching, in distinction from cutting; and consists, iirst,'in arranging a series of male dies upon the cntt'er-head,'and female dies in the bed of the machine, continuously across, placed head to point, and combining therewith a feed-motion, which advances the sheetto be cut so as to pass the foremost edge of the upper die the width et' one nail before each stroke of the dies, and a peculiarly constructed and arranged pressure-bar; in a peculiar construction of the female dies vso that they can be readily removed to be sharpened, and, at the same time, can be set to cut varyingwidths o f nails; and, secondly, in the various details by which this, the principle of the machine, is carried out.v

Tov enable others skilled in the art to make and use myinvention, I now describe itsconstruction and operation. i

I erect two side frames, A, properly shaped to receive the transverse parts, and arrange between them cross bars J,to receive the female dies K. These dies are made in sections or halves, and are fastened to the crossbar by bolts L, and are susceptible of adjustment perpendieularly and laterally by set-screws F, pressing 'them up from below, and E, pressing them in the direction of the length of the machine, so thaththey can be gauged to eut awidcr or narrower nail., as may be desired. In all the figures except iig. 5, but one set or series of dies is shown, but in fig. 5 a central die is interposed, so that, with two male dies, to enter the intervals between the lateral and central dies, four nails would be punched at a stroke by each member of the series of dies, instead of but two. Over this is placed the pressure-bar Z, slotted, to allow the passage of the male dies, as shown in fig. 6, and guided at either vend' by steady-pins, on which arc spring-washers D, to secure iigi'ty of the sheet of metal while punched, and allow a feed in thc intervals of' punching. The cross-head B vibrates in guides on the inner sides ci' the side frames A, and is formed with an interior recess,in which is fixed the male die C, by means of set-screws F adjusting it to its place vertically, and E securing it laterally. Blocks of metal may also be pressed against its sides by set-scrcws E, to prevent buckling'. It will thus bc seen that a sort of bed is formed to the machine by tho upper surface of transverse bars J and female dies K. In rear of these are the' pressure-rolls Nfor feeding forward the sheet of iron to be cut up. These are geared together by cogs O,

vexternal tothe machine, and are operated by a. pawl, T, and ratchet P, on the lower roll. The requisite pressure is given to them by means of a lever of the second kind, W, which is kept depressed by bolt V, passing through it, spring Usurrounding bolt V, and pressing u'pon lever W, and thumb-screw X compressing spring U. This lever depresscs tl'iejournal-boxes of the upper roll, which ride in slots of the side frames, and any unevenness of the iron passing through the machine is allowed for and taken up by spring U. I

The cross-head B is operated by a connecting-rod, G, firmly fastened to it by a device allowing a reciproeating rotary motion, and operated by an eccentric, II, on shaft I, which eccentric also operates the feed-motion by means of connectingrod R2, attached to lever of the third kind, S2, which operates, from its upper` end, connecting-rod R, giving motion to lever of 4the second kind, S, which carries pawl T, and, forcing it against the ratchet P, compels the revolution of the feed-rolls. This feed-motion may be regulated in length by varying the sizeof` the ratchet-teeth, or by altering the connections of connecting-rods 1l. or Rg with snid levers S Si, the ratchet being sufficiently finetoothed to allow of one or more teeth being passed by each'stroke of the pawl.

A gauge, Y, upon the bed of the machine, guides the edge oi the nail-plete, which is tobe eut by the dies, and, in eo-operation with the feed-rolls, secures the complete consumption of all the material, or allows the part uneonsurned to be saved in a valuable form.

Upon revolving shaft I, by means of the connecting-rods R2 and G, the feed and cutting-motions are set in motion, and we have the plate regularly fed forward and completely eut up, the nails being punched and cut alternately, heads and points, by the cutting-edges of the dies, each halt' of thefemnle die cutting a side of' a nail at each stroke, the object of this machine being to avoid the impractieable lateral traverse of the sheet metal or its frequent turning, and to do rapid work, and to avoid the twist frequently given to the nails when eut instead of punched.

I claim as my invention, and desire to secure by Letters Patent- 1. In combination with a feeding-device, so arranged as to feed the forward edge o? the nuil-sheet past the foremost edge of the upper die, bythe width of one nail, at each stroke of the cutter-head, and n pressure-bar, Z, slotted as shown, the arrangement ol the male dies C and female dies K, place-l in'transt'erse series, bends to points, substantially as and for the purpose described.

2. The arrangement of lever W, spring U, standard V, und nut X, in combination with thejournnl of roll N, as and for the purpose described.

3. The arrangement of female dies K K, made in halves, in cross-bars J, as held by bolts L, and adjusted by set-screws E and F, as and for the purposes described.

4. The arrangement of levers S S", connecting-rods` R R2, 'substantially as and for the purpose described.

BENJA. ROBINSON.

Witnesses W. F. RICHARDSON, F. W. LONGLEY. 

